SIMULATING ASSOCIATED GAS FLARING IN A RECOVERY COMBUSTION CHAMBER

Using ANSYS Fluent software, numerical simulation has been conducted for fl ow and burning processes in combustion chambers of gas-turbine power plants designed to recover oil-associated (casing-head) gas. The working process equations are considered in the Euler approach. The system of partial differential equations describing a threedimensional burning turbulent fl ow contains the laws of conservation of total mass, the mass of separate combustion product components, the combustion product momentum, the combustion product energy, the law of conservation of fuel composition elements, mixture fraction, turbulence kinetic energy. and dissipation of turbulence kinetic energy. The introduction of mixture fraction simplifi es substantially the solution of the problem of turbulent mixing of the oxidizing agent and the fuel. Scalar quantities (density, temperature, and mass concentrations of components) are determined using the probability density function in accounting for the fi nal chemical reaction rate of an unpremixed mixture. The fl ow velocity fi eld is calculated using the "realizable" k–ε turbulence model. The results have been obtained for different schemes of component supply into the combustion chamber. A comparison of calculated and experimental data is given
   
Author:  N. L. Bachev, O. O. Matyunin, A. A. Shilova, R. V. Bul′bovich
Keywords:  numerical simulation, working process equations, hybrid model, verifi cation of results
Page:  977